<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>给定的点集计算冯罗诺图 </title>
<style>

.axis--y path {
  display: none;
}

.cities {
  fill: none;
  stroke: #aaa;
  stroke-linejoin: round;
  stroke-linecap: round;
  stroke-width: 1.5px;
}

.city--hover {
  stroke: #000;
}

.focus text {
  text-anchor: middle;
  text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
}

.voronoi path {
  fill: none;
  pointer-events: all;
}

.voronoi--show path {
  stroke: red;
  stroke-opacity: 0.2;
}

#form {
  position: absolute;
  top: 20px;
  right: 30px;
}


</style>
</head>
<body>
<svg width="960" height="500"></svg>
<label id="form" for="show-voronoi">
  Show Voronoi
  <input type="checkbox" id="show-voronoi" disabled>
</label>
	<script
		src="${pageContext.request.contextPath}/static/fw/plugin/d3/d3.min.js"
		charset="utf-8"></script>
	<script>


	var months,
	    monthKeys,
	    monthParse = d3.timeParse("%Y-%m");

	var svg = d3.select("svg"),
	    margin = {top: 20, right: 30, bottom: 30, left: 40},
	    width = svg.attr("width") - margin.left - margin.right,
	    height = svg.attr("height") - margin.top - margin.bottom,
	    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

	var x = d3.scaleTime()
	    .range([0, width]);

	var y = d3.scaleLinear()
	    .range([height, 0]);

	var voronoi = d3.voronoi()
	    .x(function(d) { return x(d.date); })
	    .y(function(d) { return y(d.value); })
	    .extent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]]);

	var line = d3.line()
	    .x(function(d) { return x(d.date); })
	    .y(function(d) { return y(d.value); });

	d3.tsv("${pageContext.request.contextPath}/pages/voronoi/mutil_line.tsv", type, function(error, data) {
	  if (error) throw error;

	  x.domain(d3.extent(months));
	  y.domain([0, d3.max(data, function(c) { return d3.max(c.values, function(d) { return d.value; }); })]).nice();

	  g.append("g")
	      .attr("class", "axis axis--x")
	      .attr("transform", "translate(0," + height + ")")
	      .call(d3.axisBottom(x));

	  g.append("g")
	      .attr("class", "axis axis--y")
	      .call(d3.axisLeft(y).ticks(10, "%"))
	    .append("text")
	      .attr("x", 4)
	      .attr("y", 0.5)
	      .attr("dy", "0.32em")
	      .style("text-anchor", "start")
	      .style("fill", "#000")
	      .style("font-weight", "bold")
	      .text("Unemployment Rate");

	  g.append("g")
	      .attr("class", "cities")
	    .selectAll("path")
	    .data(data)
	    .enter().append("path")
	      .attr("d", function(d) { d.line = this; return line(d.values); });

	  var focus = g.append("g")
	      .attr("transform", "translate(-100,-100)")
	      .attr("class", "focus");

	  focus.append("circle")
	      .attr("r", 3.5);

	  focus.append("text")
	      .attr("y", -10);

	  var voronoiGroup = g.append("g")
	      .attr("class", "voronoi");

	  voronoiGroup.selectAll("path")
	    .data(voronoi.polygons(d3.merge(data.map(function(d) { return d.values; }))))
	    .enter().append("path")
	      .attr("d", function(d) { return d ? "M" + d.join("L") + "Z" : null; })
	      .on("mouseover", mouseover)
	      .on("mouseout", mouseout);

	  d3.select("#show-voronoi")
	      .property("disabled", false)
	      .on("change", function() { voronoiGroup.classed("voronoi--show", this.checked); });

	  function mouseover(d) {
	    d3.select(d.data.city.line).classed("city--hover", true);
	    d.data.city.line.parentNode.appendChild(d.data.city.line);
	    focus.attr("transform", "translate(" + x(d.data.date) + "," + y(d.data.value) + ")");
	    focus.select("text").text(d.data.city.name);
	  }

	  function mouseout(d) {
	    d3.select(d.data.city.line).classed("city--hover", false);
	    focus.attr("transform", "translate(-100,-100)");
	  }
	});

	function type(d, i, columns) {
	  if (!months) monthKeys = columns.slice(1), months = monthKeys.map(monthParse);
	  var c = {name: d.name.replace(/ (msa|necta div|met necta|met div)$/i, ""), values: null};
	  c.values = monthKeys.map(function(k, i) { return {city: c, date: months[i], value: d[k] / 100}; });
	  return c;
	}

	</script>
</body>
</html>